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A study was made for the number of perso...

A study was made for the number of persons of different age groups visited in a library in a week which is shown in the histogram. Study the histogram and answer the questions given below.
एक सप्ताह में एक पुस्तकालय में जाने वाले विभिन्न आयु समूहों के व्यक्तियों की संख्या के लिए एक अध्ययन किया गया था जो हिस्टोग्राम में दिखाया गया है। हिस्टोग्राम का अध्ययन करें और नीचे दिए गए प्रश्नों के उत्तर दें
The ratio of the number of persons in the age groups 15-20 years and 20-25 years together, to the number of persons in the age group 30-35 years and 35-40 years together, is:

A

`14:9`

B

`14:17`

C

`13:9`

D

`15:19`

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